data_global
_chemical_name_mineral 'Kanemite'
loop_
_publ_author_name
'Vortmann S'
'Rius J'
'Marler B'
'Gies H'
_journal_name_full 'European Journal of Mineralogy'
_journal_volume 11 
_journal_year 1999
_journal_page_first 125
_journal_page_last 134
_publ_section_title
;
 Structure solution from powder data of the hydrous layer
 silicate kanemite, a precursor of the industrial ion exchanger SKS-6
;
_database_code_amcsd 0006765
_chemical_formula_sum 'Si2 O8 Na H6'
_cell_length_a 4.946
_cell_length_b 20.510
_cell_length_c 7.277
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 738.197
_exptl_crystal_density_diffrn      1.918
_symmetry_space_group_name_H-M 'P b c n'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,-y,1/2+z'
  '-x,y,1/2-z'
  '1/2-x,1/2+y,z'
  '1/2+x,1/2-y,-z'
  '1/2+x,1/2+y,1/2-z'
  '1/2-x,1/2-y,1/2+z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Si   0.04640   0.29230  -0.03820   0.01400
O1   0.00000   0.68880   0.25000   0.02500
O2   0.35750   0.26730  -0.01510   0.02500
O3   0.00360   0.35810   0.07800   0.02500
Na   0.00000   0.01280   0.25000   0.03400
Wat4   0.01317   0.07800  -0.02900   0.04400
Wat5   0.00000   0.53960   0.25000   0.12000